Digital tire pressure gauge Schrader 60226-67. Measuring range 0.35-10 bar. measurement accuracy +/- 1%. For use in the temperature range -10 ° C to + 50 ° C. Battery LR44 is included. Usage: 1. Push the manometer nozzle onto the valve so. that the contact is airtight.2. Hold the manometer until the display appears.3. Remove the pressure gauge from the valve and read the reading. You can start measuring a new tire without resetting the previous reading. Calibration: Push the manometer tip onto the valve for a moment. contact does not have to be close. only a small amount of air is enough. which enters the manometer. As soon as the screen starts flashing. remove the manometer from the valve. Calibration has been performed.